Lawrence Berkeley National Laboratory
Berkeley Lab: Seaborgium
Article summarizing the naming of this element.
Web Elements
Web Elements Periodic Table: Meitnerium
This WebElements site offers basic data, history and the story of the synthesis of meitnerium.
Web Elements
Web Elements Periodic Table: Mendelevium
Good basic information along with an illustration of the likely electron arrangement of this transuranium element.
Web Elements
Web Elements Periodic Table: Neptunium
WebElements provides a very good source of basic information on neptunium, including physical properties, isotopes and electron configuration.
Corrosion Source
Corrosion Source: Neptunium
Easy to follow information on the history, sources, properties and isotopes of neptunium.
Royal Society of Chemistry
Chemical Society: Meitnerium
A concise summary on this element from The Chemical Society. Easy to follow.